#! /usr/bin/env python

t = "123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"
assert len(t) <= 64
f = open('/dev/random','rb')
s = ''
while len(s) < 8:
    c = ord(f.read(1)) & 63
    if c < len(t):
        s += t[c]
print s